Dynamic and Lexical variables in Common Lisp

Question

I am reading the book \'Practical Common Lisp\' by Peter Seibel.

In Chapter 6, "Variables" sections "Lexical Variables and Closures" and "Dyn

Answer 1

You can tell your Lisp to bind local variables dynamically, too:

(let ((dyn 5))
  (declare (special dyn))
  ... ;; DYN has dynamic scope for the duration of the body
  )